+48 Jason is driving from his home to his office, which is 20 miles away. He normally drives at a constant speed of 60 miles per hour for the whole trip. However today, 15 minutes into his drive, his car breaks down. He calls a taxi, and it arrives 20 minutes later. The taxi driver then takes him to his office driving at a constant speed of 50 miles per hour. If the total distance from home to work is 100 miles, then how much time was spent in the taxi?
